fix(core): Prevents early style pruning with leave animations (#64335)

thePunderWoman · AndrewKushnir · commit d54dd674ca9d · 2025-10-14T09:30:33.000-07:00
In some cases, the leave animation stylesheets were getting pruned too early due to the renderer removal happening before the animation function was run. This ensures that while queuing a leave animation, we guarantee the lView is referenced in the leaving animations set. This guarantees the style sheet pruning knows about the animations existing and skips the prune step. fixes: #64326 PR Close #64335
diff --git a/packages/core/src/render3/node_manipulation.ts b/packages/core/src/render3/node_manipulation.ts
@@ -407,6 +407,8 @@ function runLeaveAnimationsWithCallback(
     return callback(false);
   }
 
+  if (lView) allLeavingAnimations.add(lView);
+
   addToAnimationQueue(injector, () => {
     // it's possible that in the time between when the leave animation was
     // and the time it was executed, the data structure changed. So we need

Original file line number	Diff line number	Diff line change
`@@ -407,6 +407,8 @@ function runLeaveAnimationsWithCallback(`
`407`	`407`	`return callback(false);`
`408`	`408`	`}`
`409`	`409`
	`410`	`+ if (lView) allLeavingAnimations.add(lView);`
	`411`	`+`
`410`	`412`	`addToAnimationQueue(injector, () => {`
`411`	`413`	`// it's possible that in the time between when the leave animation was`
`412`	`414`	`// and the time it was executed, the data structure changed. So we need`